Chaeles e



(No Model.)

0. E. BURNHAM.

CLOCK STRIKING MECHANISM No. 384,191. Patented June 5, 1888.

U/zarlesEB urn7w0m WITNESSES.

UNITE STATES PATENT OFFICE.

CHARLES BURNHAM, OF "HTTE PLATNS, NFIW YORK.

CLOCK STRlKiNG MECHANISM.

SPECIFICATION forming part ofLetteIs Patent No. 384,191, dated June 5, 1888.

Application filed Oetoherl'i, 1887. Serial No. 253,548. (No model.)

To all whom it may concern.- both as to half and full hours, and the appli Be it known that 1, CHARLES E. BURNI-IAM, cation of which requires but slight and immaa citizen of the United States of America, reterial changes in the striking mechanism of siding at "White Plains, in the county of \Vestordinary clocks. chester and State of New York, have invented The secondary object of my invention is to certain new and useful Improvements in Strikprovide a striking mechanism for clocks which ing Mechanisms for Clocks; and I do hereby deis simple and effective in its operation, strong clare the following to be a full, clear, and exact and durable in its construction. easily under descriptionoftheinventiomsuch as willenable stood and readily applied, and which mate others skilled in the art to which it appertains rially decreases the constructive expense, time, to make and use the same, reference being had and labor. to the accompanying drawings, and to letters I attain these objects by my preferred form or figures of reference marked thereon, which of construction, as illustrated in the accomform a part of this specification. panying drawings, wherein like letters of ref- Myinvention relates to certain new and useerence indicate similar parts in the several ful improvements in striking mechanisms for views, and in which clocks; and it consists in the novel construc- Figure l is a rear elevation of a clock mechtion,arrangement, and combination ofdevices, anisni, showing a portion thereof in dotted which will be more fullyhereinafterdescribed, lines and with my improved construction in and pointed out in the claims. connection therewith. Fig. 2 is a side eleva- 7a I-Ieretofore the striking mechanism of clocks tion of a clock mechanism embodying my in1- has been complicated, and, if not complicated, provement. Fig. 3 is a detail perspective view of frail structure, and therefore easily disarof my improved form ofsingle toothed pinion, ranged and not positive in action. These deused for hours only. Fig. 4i is a detail side i'ects have caused inconveniences and an exelevation of a doubletoothed pinion adapted pense oflabor and time to mechanieians, both for use in striking both half and full hours. at the time of the first construction of the clock Fig. 5 is a detail perspective view of the upand the required adjustment and rearrangeper or stop pawl. ment afterward, which has often been found A and A indicate the front and rear plates necessary and requisite to regulate the parts of the supporting-frame of the clock mechanand produce a synchronous registration of the ism. The ordinary and well'known form of striking with the time mechanism. time mechanism is used in this instance, and

The essential feature of my invention 0011- the striker G is actuated by a spring, S, sursists in the use of a positively-acting countrounding a lower arbor, and having a vibratwhecl constructed with peripheral subdivis ing arm, 0, which is in engagement with the ions in the form of teeth, a portion of which pins 0 on the face of a registering-wheel, G are beveled and are indicative in number of all of which construction is well known and the hours, and. intersected by square teeth, further description thereof unnecessary. The which form stops between the hours. The said rear end of the central arbor, B, is projected wheel is further provided with aseries of hourfrom the back plate, A, and is formed with 0 pins on one face thereof, said teeth and pins either a square or screw-threaded hearing, as being engaged, respectively, by a stop-pawl may be found desirable and best adapted for in connection with the registeringwheel and the intended purpose, the hands B being a single movable toothed pinion on an eXtenmounted on the front projecting eudof the said sion of the central arbor. arbor, as is the usual form of construction. 9 5

The primary object of my invention is to Upon the rear projecting end of the central provide a striking mechanism for clocks which arbor, B, a singletoothed pinion, l), is dispenses with the use of wirework, cammounted, and consists, essentially, of a block, wheels, warning-pins, and other small parts, (I, having ears d projecting from one side which is positive in its action and regulable thereof, which. have a dog, pivoted therein IOO and mounted between the same. The dog (1 has an inwardly lower projecting portion, (P, which is adapted to bear against the lower edge of the block 'd between the ears d, and thereby prevent a downward pressure thereof. The outer portion of said dog is formed with a head, which engages with mechanism which will be more fully hereinafter described.

The pinion, as just described, is adapted for striking hours only; but, as shown in Fig. 4, a double-toothed pinion is illustrated, which is of similar construction as the single-toothed pinion, with the exception that the dogs are arranged in reverse positions and are adapted for striking the whole and half hours.

To one side of the rear plate, A, a countwheel, E, is mounted and secured by means of a hollow flanged stud, e, which is attached to or formed with a bearing-plate, e, secured to the said rear plate, A. A spring bifurcated washer, a is secured to the wheel E and engages with the flanged head of the stud e,

and thereby holds the count-wheel in a relative position with the said stud. The periphery of the wheel E is divided into seventy-eight teeth. A portion of the beveled teeth 6 are at an angle to the plane of rotation of the wheel E, and are indicative of the number of the hours from one to twelve, as indicated on the clock face. Between each series of beveled teeth 6 square slightly -br0adened stop-teeth c are formed, which cause a cessation of the vibrations of the striker.

The one face of the wheel E is provided with studs or pins, which are arranged at such distances apart as to be relative to the number of teeth 6 and to the hours. Immediately above the count-wheel a stop-pawl, E, is mounted on the projecting end of an arbor, in connection with and actuated by a train of gearing from the registering-wheel. This pawl E engages with the teeth 6 as it revolves, and when the number of teeth shall have been traversed the projecting pin portion of the said pawl rests on the top surface of the following stop-tooth c and prevents the count-wheel from further revolving.

As the lower central arbor, B, revolves, the toothed pinion on the rear projecting portion thereof also revolves. As the said arbor carries the minute-hand, it revolves once in an hour, and consequently the single-toothed pinion has the same revolution in the same length of time. The upper pawl, E, normally rests on the square-crowned teeth of the count-wheel, and when the pinion has reached the limit of the revolution the head thereof strikes against one of the pins on the one face of the count-wheel and slightly moves the wheel in the direction of the arrow. This movement displaces the pawl E from its position of rest on one of the square teeth, and, actuated by the spring mechanism of the striking parts, it revolves and engages with the teeth c until it again reaches a square tooth. This operation The remaining portion of the clock meehanism is of ordinary and well-known construction, and will be readily understood by those skilled in the art.

The utility and, adaptability of my improvement being obviously apparent, it is unnecessary to further enlarge upon the same herein.

It is obvious that slight. variations in the construction and arrangement of the improved parts might be made and substituted for those shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new is 1. The combinatio'mwith the time and striking train mechanism of a clock, of a countwheel having a series of beveled teeth intersected by flat-faced stop teeth, the tops of which are partially beveled, and a series of pins or studs, a stop-pawl connected to the striking-train, and a pinion attached to the time-train, said pawl and pinion relatively operating to respectively stop and start the movement of the count-wheel, substantially as described.

2. The combination,with the time and striking train mechanism of a clock, of a count-.

wheel constructed as set forth, a pinion to start the movement thereof, and a pawl to limit and stop its movement, substantially as described.

3. The combinatiomwith the time and striking mechanisms of a clock, of the pinion having one or more movable teeth or dogs, the count-wheel constructed with teeth and pins, as set forth, and the stop-paw], all arranged and operating as set forth.

4. The combinationnvith the time and striking mechanisms of a clock, of a pinion having one or more movable teeth or dogs mounted on the rear projecting end of the hand-arbor, the count-wheel having the form of teeth set forth, the bearing-stud for the count-wheelhaving a flange, the bifurcated spring-washer, and the stop in connection with the striking mechanism, substantially as described.

5. The combinatiomwith the time and striking mechanisms of a clock, of apinion having one or more movable teeth or dogs mounted on the rear projecting end of the central or hand arbor, the count-wheel having a series of teeth and studs or pins, as set forth, the teeth or dogs of said pinion engaging with the said studs or pins, and a revolving stoppawl arranged above the count-wheel in con- 1 In testimony whereof I affix my signature in neat-ion with the v striking mechanism, and presence of two wltnesses. having a projeetlng pin which engages with l T 7 1 the teeth of the said count-whee], and bear- I CHARLES BURLHAM 5 ing on a portion thereof to stop the revoln- KVitnesses:

tion of the count-Wheel, substantially as de- XVILSON BROWN, J12 scribed. R. C. ONEIL. 

